Question

what is the pattern 3, -6, 12, 4, 20

Answer 1

let's try addition
3-9=-6
-6+18=12
12-8=4
4+16=20
doesn't seem to be a pattern
try mulitpcation

3 times -2=-6
-6 times -2=12
12 times 1/3=4
4 times 5=20
can't see a pattern
dunno what the patttern is
unless you mistyped th equestio